Height at Base Age, Maximum
Maximum height (in feet) of a tree, shrub or sub-shrub, under ideal conditions, at a base age. The base age is 20 years for trees in temperate areas (>30 degrees north latitude), 10 years for trees in tropical areas (≤30 degrees north latitude), and 10 years for all shrubs and sub-shrubs. Ideal conditions are defined as soil pH = 5.0-7.8; soil salinity ≤ 4 mmhos/cm; soil depth ≥ 40 inches; effective average annual precipitation ≥ 30 inches; soil texture class = medium; no ponding; rare or no annual flooding; and high water table depth ≥ 1 foot during plant active growth period.
(Plants other than trees, shrubs, and sub-shrubs are left blank here.)
Source: USDA Plants Database« Back to Glossary Index